/*  This file is part of YUView - The YUV player with advanced analytics toolset
*   <https://github.com/IENT/YUView>
*   Copyright (C) 2015  Institut f�r Nachrichtentechnik, RWTH Aachen University, GERMANY
*
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation; either version 3 of the License, or
*   (at your option) any later version.
*
*   In addition, as a special exception, the copyright holders give
*   permission to link the code of portions of this program with the
*   OpenSSL library under certain conditions as described in each
*   individual source file, and distribute linked combinations including
*   the two.
*
*   You must obey the GNU General Public License in all respects for all
*   of the code used other than OpenSSL. If you modify file(s) with this
*   exception, you may extend this exception to your version of the
*   file(s), but you are not obligated to do so. If you do not wish to do
*   so, delete this exception statement from your version. If you delete
*   this exception statement from all source files in the program, then
*   also delete it here.
*
*   This program is distributed in the hope that it will be useful,
*   but WITHOUT ANY WARRANTY; without even the implied warranty of
*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*   GNU General Public License for more details.
*
*   You should have received a copy of the GNU General Public License
*   along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

#include "common/typedef.h"
#include "common/EventSubsampler.h"

#include <QObject>
#include <QTimer>

#include <optional>

class PlotModel : public QObject
{
  Q_OBJECT

signals:
  void dataChanged();
  void nrStreamsChanged();

public:
  PlotModel()
  {
    this->connect(&this->eventSubsampler, &EventSubsampler::subsampledEvent, this, &PlotModel::dataChanged);
  }

  enum class PlotType
  {
    Bar,
    Line,
    ConstValue
  };

  struct PlotParameter
  {
    PlotType type;
    unsigned nrpoints;
  };

  struct StreamParameter
  {
    unsigned getNrPlots() const { return unsigned(this->plotParameters.size()); }
    Range<int> xRange;
    Range<int> yRange;
    QList<PlotParameter> plotParameters;
  };

  struct Point
  {
    double x, y, width;
    bool intra;
  };

  virtual unsigned getNrStreams() const = 0;
  virtual StreamParameter getStreamParameter(unsigned streamIndex) const = 0;
  virtual Point getPlotPoint(unsigned streamIndex, unsigned plotIndex, unsigned pointIndex) const = 0;
  virtual QString getPointInfo(unsigned streamIndex, unsigned plotIndex, unsigned pointIndex) const = 0;

  std::optional<unsigned> getPointIndex(unsigned streamIndex, unsigned plotIndex, double x) const
  {
    const auto streamParam = this->getStreamParameter(streamIndex);
    if (plotIndex >= unsigned(streamParam.plotParameters.size()))
      return {};
    const auto nrPoints = this->getStreamParameter(streamIndex).plotParameters[plotIndex].nrpoints;
    for (unsigned pointIndex = 0; pointIndex < nrPoints; pointIndex++)
    {
      const auto point = this->getPlotPoint(streamIndex, plotIndex, pointIndex);
      if (x > point.x - point.width / 2 && x <= point.x + point.width / 2)
        return pointIndex;
    }
    return {};
  }

protected:
  EventSubsampler eventSubsampler;
};
